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Rattus is a genus of muroid rodents, all typically called rats. However, the term rat can also be applied to rodent species outside of this genus.
The black rat (Rattus rattus), also known as the roof rat, ship rat, or house rat, is a common long-tailed rodent of the stereotypical rat genus Rattus, in the subfamily Murinae. [1] It likely originated in the Indian subcontinent, but is now found worldwide. [2] The black rat is black to light brown in colour with a lighter underside.
A rat in a suburb of Vancouver Skeleton of a black rat (Rattus rattus) on display at the Museum of Osteology. The best-known rat species are the black rat (Rattus rattus) and the brown rat (Rattus norvegicus). This group, generally known as the Old World rats or true rats, originated in Asia.
The brown rat (Rattus norvegicus), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat and Norwegian rat, is a widespread species of common rat. One of the largest muroids , it is a brown or grey rodent with a body length of up to 28 cm (11 in) long, and a tail slightly shorter than that.
The fancy rat (Rattus norvegicus domestica) is the domesticated form of Rattus norvegicus, the brown rat, [1] and the most common species of rat kept as a pet.The name fancy rat derives from the use of the adjective fancy for a hobby, also seen in "animal fancy", a hobby involving the appreciation, promotion, or breeding of pet or domestic animals.
Its belly is gray in the midline with whiter flanks. The tail is uniformly medium brown. They have chisel-like incisor. The ricefield rat is between 304–400 mm long with a tail length of 140–200 mm and a skull length of 37–41 mm. The average weight of Rattus argentiventer is around 97 to 219 g. Female have 12 mammae.
The Polynesian rat, Pacific rat or little rat (Rattus exulans), or kiore, is the third most widespread species of rat in the world behind the brown rat and black rat.Contrary to its vernacular name, the Polynesian rat originated in Southeast Asia, and like its relatives has become widespread, migrating to most of Polynesia, including New Zealand, Easter Island, and Hawaii.
The Gag Island rat or Niken's rat (Rattus nikenii) is a species of rodent in the family Muridae.It is endemic to Gag Island in West Papua, Indonesia. [2]It was described in 2010 after studies found it to be distinct in anatomy and coloration from other Papuan Rattus species.